메인메뉴바로가기

한양대학교 산학협력단

홈으로 바로가기 > 연구정보 > 연구성과 > Recent Articles

연구성과 > Recent Articles

  • 한양대학교 기관으로 출판된 최신 SCI급 논문현황 (Web Of Science에서 제공되는 자료)
  • 매주 1회 업데이트
페이스북 로그인트위터 로그인카카오톡 로그인메일 전송
view

SCI Article

Wall-thickness-dependent strength of nanotubular ZnO
Author 장재일 (Div Mat Sci & Engn);
Corresponding Author Info Kim, JY (reprint author), UNIST, Sch Mat Sci & Engn, Ulsan 44919, South Korea.; Kim, JY (reprint author), UNIST, KIST UNIST Ulsan Ctr Convergent Mat, Ulsan 44919, South Korea.
E-mail 씠硫붿씪 븘씠肄juyoung@unist.ac.kr
Document Type Article
Source SCIENTIFIC REPORTS Volume:7 Issue: Pages:- Published:2017
Times Cited 0
External Information PDF 븘씠肄http://dx.doi.org/10.1038/s41598-017-04696-4
Abstract We fabricate nanotubular ZnO with wall thickness of 45, 92, 123 nm using nanoporous gold (np-Au) with ligament diameter at necks of 1.43 mu m as sacrificial template. Through micro-tensile and micro-compressive testing of nanotubular ZnO structures, we find that the exponent m in (sigma) over bar proportional to (rho) over bar (m), where (sigma) over bar is the relative strength and (rho) over bar is the relative density, for tension is 1.09 and for compression is 0.63. Both exponents are lower than the value of 1.5 in the Gibson-Ashby model that describes the relation between relative strength and relative density where the strength of constituent material is independent of external size, which indicates that strength of constituent ZnO increases as wall thickness decreases. We find, based on hole-nanoindentation and glazing incidence X-ray diffraction, that this wall-thickness-dependent strength of nanotubular ZnO is not caused by strengthening of constituent ZnO by size reduction at the nanoscale. Finite element analysis suggests that the wall-thickness-dependent strength of nanotubular ZnO originates from nanotubular structures formed on ligaments of np-Au.
Web of Science Categories Multidisciplinary Sciences
Funding National Research Foundation of Korea (NRF) grant - Ministry of Science, ICT & Future Planning (MSIP) [NRF-2015R1A15A1037627]; KIST-UNIST partnership program [1.160097.01/2.160482.01]; Global Frontier R&D Program on Center for Multiscale Energy System - N
Language English
페이스북 로그인트위터 로그인카카오톡 로그인메일 전송 리스트